Layer Sets (groups)

Question

Hi fellas. It's been a while!
I tend not to use groups (layer sets) myself, but other people do. I've got several scripts that loop over all layers in a psd and then peform various tasks.
Of course they fall over if layersets are involved; so I need to change that.
To test this out I wrote a script and made a simple psd; New document (any size), background, one layer (called "layer 1") and another layer ("layer 2") which is in a layer set ("a_group")
I've got a basic script here that loops through all layers (or so I thought)
<code>
var srcDoc = app.activeDocument;
var numOfLayers = srcDoc.layers.length;
for (var i = numOfLayers -1; i >= 0  ; i--)
{    var layerName = srcDoc.layers[i].name;
    // check for groups
    if (srcDoc.layers[i].typename == "LayerSet")
    alert (layerName + " is a group")
    else
    alert (layerName + " is not in a group")
</code>
The alert calls all layer names as it goes up the stack. It however misses out layer 2 (which is in a group) So what am I missing out?
Cheers

Answer 1

I think you need a function that calls itself, because Layers in LayerSets are children of the LayerSet and not the document.
var theLayers = collectLayers(app.activeDocument, []);
alert (theLayers.join("\n"));
////// function collect all layers //////
function collectLayers (theParent, allLayers) {
          if (!allLayers) {var allLayers = new Array}
          else {};
          for (var m = theParent.layers.length - 1; m >= 0;m--) {
                    var theLayer = theParent.layers[m];
// apply the function to layersets;
                    if (theLayer.typename == "ArtLayer") {
                              allLayers.push(theLayer)
                    else {
                              allLayers = (collectLayers(theLayer, allLayers))
// this line includes the layer groups;
                              allLayers.push(theLayer);
          return allLayers